Maya Angelou said this quote

Love. And again, see I don't mean, I think love is that condition in the human spirit so profund, that it allows us to forgive, and it may be the energy which keeps the stars in the firmament, I'm not sure. It may be the energy which keeps the blood running smoothly through our veins. I'm not sure, but it's something beyond the explanation. It can be used for anything you can explain. Any good thing you can explain.